Very often such statues were enclosed in rectangular shrines or wall niches whose only opening was at the front, making it natural for the statue to display frontality.
这些雕像通常被封闭在长方形的神龛或壁龛中，它们唯一的开口在前面，这使得雕像很自然地展现了正面。
2
Many zoologists believe that it was because so many ecological niches were available with virtually no competition from existing species.
很多动物学家认为，这是因为，在几乎没有任何现存竞争物种的情况下，有太多的生态小生境可供生存。
3
This fact was of enormous value in helping the national economies find their niches in the evolving currents of the international economy.